Results 201 to 210 of about 27,886 (261)
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Transition Metal Complexation in 1,3-Dipolar Cycloadditions
HETEROCYCLES, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
BROGGINI, GIANLUIGI+3 more
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Access to Imidazolidines via 1,3-Dipolar Cycloadditions of 1,3,5-Triazinanes with Aziridines.
Journal of Organic Chemistry, 2019The unprecedented 1,3-dipolar cycloaddition of 1,3,5-triazinanes and aziridines has been described. With readily available starting material, this method offers efficient access to a wide range of functionalized imidazolidine derivatives in moderate to ...
Liang Tu+8 more
semanticscholar +1 more source
Organic Letters, 2019
Nonstabilized azomethine ylides derived from decarboxylation of oxazolidin-5-ones were used for double 1,3-dipolar cycloadditions in diastereoselective synthesis of pyrrolidine-containing tetracyclic compounds.
Xiaofeng Zhang+5 more
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Nonstabilized azomethine ylides derived from decarboxylation of oxazolidin-5-ones were used for double 1,3-dipolar cycloadditions in diastereoselective synthesis of pyrrolidine-containing tetracyclic compounds.
Xiaofeng Zhang+5 more
semanticscholar +1 more source
Boryl Azides in 1,3-Dipolar Cycloadditions
The Journal of Organic Chemistry, 2014The 1,3-dipolar cycloaddition reaction of boron azides with alkynes has been investigated experimentally and computationally. At room temperature pinBN3 (pin = pinacolato) reacts with the strained triple bond of cyclooctyne with formation of an oligomeric boryl triazole.
Holger F. Bettinger+2 more
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Organic Letters, 2015
The thermal 1,3-dipolar cycloadditions of 4-acetoxyallenoates 1 with various dipoles have been reported. When azomethine imines and nitrones are used as the 1,3-dipole partner, the corresponding reactions afford 2,3-dihydropyrazole and 2,3 ...
Falin Li+5 more
semanticscholar +1 more source
The thermal 1,3-dipolar cycloadditions of 4-acetoxyallenoates 1 with various dipoles have been reported. When azomethine imines and nitrones are used as the 1,3-dipole partner, the corresponding reactions afford 2,3-dihydropyrazole and 2,3 ...
Falin Li+5 more
semanticscholar +1 more source
1,3-Dipolar Cycloadditions in Aqueous Media
HETEROCYCLES, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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Organic Letters, 2015
A new method has been developed for the catalytic enantioselective 1,3-dipolar cycloaddition of the Seyferth-Gilbert reagent (SGR) to isatylidene malononitriles using a cinchona alkaloid derivative as a catalyst.
Taiping Du+3 more
semanticscholar +1 more source
A new method has been developed for the catalytic enantioselective 1,3-dipolar cycloaddition of the Seyferth-Gilbert reagent (SGR) to isatylidene malononitriles using a cinchona alkaloid derivative as a catalyst.
Taiping Du+3 more
semanticscholar +1 more source
Organic Letters, 2016
In the presence of CuI, 1,3-dipolar cycloadditions of N,N'-cyclic azomethine imines with iminooxindoles proceeded readily and furnished novel oxindole spiro-N,N-bicyclic heterocycles in moderate to excellent chemical yields with excellent ...
Hong‐Wu Zhao+9 more
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In the presence of CuI, 1,3-dipolar cycloadditions of N,N'-cyclic azomethine imines with iminooxindoles proceeded readily and furnished novel oxindole spiro-N,N-bicyclic heterocycles in moderate to excellent chemical yields with excellent ...
Hong‐Wu Zhao+9 more
semanticscholar +1 more source
, 2017
Various indolizines are synthesized through one-pot, two-step 1,3-dipolar cycloadditions in recyclable [Omim]Br with high yields and a broad substrate scope.
Xiao Zhang+3 more
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Various indolizines are synthesized through one-pot, two-step 1,3-dipolar cycloadditions in recyclable [Omim]Br with high yields and a broad substrate scope.
Xiao Zhang+3 more
semanticscholar +1 more source
Chemical Communications, 2015
The synthesis of the novel azomethine ylide, isoquinolino[4,3,2-de]phenanthridine, and its use in 1,3-dipolar cycloaddition with various alkenes and alkynes to form the corresponding fused pyrrolidines and pyrroles is reported.
Shingo Ito, Yuki Tokimaru, Kyoko Nozaki
semanticscholar +1 more source
The synthesis of the novel azomethine ylide, isoquinolino[4,3,2-de]phenanthridine, and its use in 1,3-dipolar cycloaddition with various alkenes and alkynes to form the corresponding fused pyrrolidines and pyrroles is reported.
Shingo Ito, Yuki Tokimaru, Kyoko Nozaki
semanticscholar +1 more source